The known forces of nature can be divided into four classes, viz., gra

The known forces of nature can be divided into four classes, viz., gravity, electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?

[amp_mcq option1=”Gravity is the strongest of the four” option2=”Electromagnetism acts only on particles with an electric charge” option3=”Weak nuclear force causes radioactivity” option4=”Strong nuclear force holds protons and neutrons inside the nucleus of an atom” correct=”option1″]

This question was previously asked in

UPSC IAS – 2013

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The statement that Gravity is the strongest of the four fundamental forces is not correct.

The four fundamental forces of nature are, in order of decreasing strength: Strong Nuclear Force, Electromagnetic Force, Weak Nuclear Force, and Gravity. Gravity is by far the weakest of the four forces. The Strong Nuclear Force holds the nucleus together, Electromagnetism governs interactions between charges, and the Weak Nuclear Force is involved in radioactive decay.

Although gravity is the weakest force at the particle level, its effects are cumulative and always attractive. This makes it the dominant force on large astronomical scales (planets, stars, galaxies). The relative strengths of the forces are approximately: Strong Nuclear Force ~ 1, Electromagnetic Force ~ 10⁻², Weak Nuclear Force ~ 10⁻⁶, Gravity ~ 10⁻³⁹ (relative to the strong force at typical nuclear scales).

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